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Black glass-ceramics prepared by electroplating sludge, and preparation method of black glass-ceramics

A technology of glass-ceramic and electroplating sludge, which is applied to the black glass-ceramic prepared by electroplating sludge and the field of preparation thereof, can solve the problems of insufficient adaptability of black glass-ceramic, aggravating the volatilization of heavy metals, secondary pollution of the environment, etc. Avoid heavy metal leaching, avoid volatilization, high mechanical properties

Inactive Publication Date: 2018-12-18
浙江工业大学温州科学技术研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, due to the complex components and large fluctuations in the content of electroplating sludge, and black glass-ceramics have high requirements for color difference and mechanical properties, this process is not suitable for the preparation of black glass-ceramics.
[0005] In addition, in the traditional glass-ceramic preparation process, such as the Chinese invention patent application (CN 101857367A), the melting temperature is generally as high as 1500°C, which not only consumes a lot of energy resources, but also increases the volatilization of some heavy metals at high temperatures, resulting in secondary pollution to the environment

Method used

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  • Black glass-ceramics prepared by electroplating sludge, and preparation method of black glass-ceramics
  • Black glass-ceramics prepared by electroplating sludge, and preparation method of black glass-ceramics
  • Black glass-ceramics prepared by electroplating sludge, and preparation method of black glass-ceramics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Weigh 30g oven-dried electroplating sludge, weigh batch material (24g sodium carbonate, 30g borax, 10.8g silicon dioxide, 0.2g zinc oxide), colorant (1.8g iron oxide, 0.2g cobalt oxide) , placed in a ball mill and stirred for 120 min to obtain the initial raw material for burning black glass-ceramics.

[0039] (2) Put the initial raw material of black glass-ceramics obtained by ball milling in step (1) into a crucible, heat up to 950°C in a muffle furnace, melt and keep it for 180 minutes, and then cool down to room temperature with the furnace to obtain the basic glass.

[0040] (3) Heat the basic glass obtained in step (2) to 550°C in a muffle furnace, hold it for 60 minutes for nucleation, then raise the temperature to 720°C, hold it for 120 minutes for crystallization, and obtain black glass-ceramic.

Embodiment 2

[0042] (1) Weigh 25g of oven-dried electroplating sludge, weigh batch materials (30g sodium carbonate, 18g borax, 11g silicon dioxide, 1g zinc oxide), coloring agent (0.2g cobalt oxide), and place in a ball mill to stir and ball mill After 60 minutes, the initial raw material for firing black glass-ceramic was obtained.

[0043] (2) Put the initial raw material of black glass-ceramics obtained by ball milling in step (1) into a crucible, heat up to 1000°C in a muffle furnace, melt and keep it for 240 minutes, and then cool to room temperature with the furnace to obtain the basic glass.

[0044] (3) Heat the basic glass obtained in step (2) to 580°C in a muffle furnace, hold it for 120 minutes for nucleation, then raise the temperature to 780°C, hold it for 240 minutes for crystallization, and obtain black glass-ceramics.

Embodiment 3

[0046] (1) Weigh 35g oven-dried electroplating sludge respectively, take batching material (27g sodium carbonate, 16g borax, 7g silicon dioxide), colorant (4g iron oxide, 1g cobalt oxide), place in ball mill and stir ball mill for 90min , to obtain the initial raw material for firing black glass-ceramics.

[0047] (2) Put the initial raw material of the black glass-ceramics obtained by ball milling in step (1) into a crucible, raise the temperature to 1100°C in a muffle furnace, melt and keep it for 120 minutes, and then cool down to room temperature with the furnace to obtain the basic glass.

[0048] (3) Heat the basic glass obtained in step (2) to 560°C in a muffle furnace, hold it for 90 minutes for nucleation, then raise the temperature to 760° C, hold it for 120 minutes for crystallization, and obtain black glass-ceramic.

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Abstract

The invention relates to black glass-ceramics prepared by electroplating sludge, and a preparation method of the black glass-ceramics. The black glass-ceramics is prepared from the following raw materials in parts by weight: 25-35 parts of the electroplating sludge, 20-35 parts of sodium carbonate, 15-35 parts of borax, 0-15 parts of silicon dioxide, 0-5 parts of zinc oxide and 0.2-5 parts of a colorant. The black glass-ceramics is prepared by improving the raw material formula, and can be prepared under the conditions of lower melting temperature and crystallization temperature; the compactness and mechanical strength of the black glass-ceramics also can be improved; the crystal phase and color difference of the black glass-ceramics are stabilized; various heavy metal elements are prevented from being filtered out.

Description

technical field [0001] The invention relates to the preparation of black glass-ceramic, in particular to a black glass-ceramic prepared from electroplating sludge and a preparation method thereof. Background technique [0002] Electroplating sludge is the product obtained after harmless treatment of electroplating wastewater. Because electroplating wastewater sludge absorbs or precipitates 50-80% of harmful heavy metals in electroplating wastewater, it is listed as national hazardous waste ("National Hazardous Waste List" HW17 , HW21), and these heavy metals are unstable in nature, and are easy to enter water bodies in the form of ions, polluting the environment and endangering organisms. At present, my country's electroplating industry has a large scale, with an average annual discharge of electroplating sludge reaching tens of millions of tons. The current level of sludge treatment technology is generally not high, so the development of recycling technology for electroplat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/00C03C4/02C03C6/04
CPCC03C1/002C03C4/02C03C10/0063
Inventor 盛嘉伟孙青严俊张俭
Owner 浙江工业大学温州科学技术研究院